JPH051408A - Water stopping material and water stopping method - Google Patents

Abstract

PURPOSE:To provide a water stopping material capable of improving workability for stopping water, preventing a water stopping agent from flowing to a foundation, and maintaining a long-term water stopping effect. CONSTITUTION:Water permeable sheet materials 5a and 5b are pasted to the front and reverse sides of a bulky and long network mat 2 formed with synthetic polymer continuous filaments 21b having a diameter of between 0.5mm and 1.5mm. Also, the gaps of the mat 2 are lamellarly filled with a water stopping agent 7 for sealing. Furthermore, at least one of the sheet materials 5a and 5b is extended from a both-end bonded section externally to form a water stopping material 1 having a jointing lug section 11. In executing a construction work for water stopping, the lug section 11 is overlaid on the side edge of an adjacent water stopping material 1, and the overlaid section is filled with a water stopping agent 7A, thereby preventing water leakage at the joint section of the water stopping materials 1 and 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-stopping material and a water-stopping construction method for stopping water at a bottom or slope of a pond or a river, a revetment, etc., or for shielding wastes. is there.

[0002]

2. Description of the Related Art Conventionally, in the field of civil engineering, a lot of construction work has been carried out to construct an artificial pond such as a reservoir pond, a park pond or a golf course hazard and an industrial waste treatment plant. A still water construction method is desired.

As a conventional waterproof material, as described in, for example, US Pat. No. 3,186,896, a so-called double-sided cardboard is formed by connecting plate-like sheets and corrugated sheets, which are arranged to face each other at a constant interval. A structure having a structure in which a void formed between a plate-shaped sheet and a corrugated sheet is filled with bentonite is widely used.

Further, two sheets of upper and lower non-woven fabrics are used, bentonite is filled between the non-woven fabric on the castle surface and the non-woven fabric on the lower surface, and the sheet is formed by interposing bentonite in a sandwich by needle punching, or an impermeable sheet. There is also provided a waterproofing material in which bentonite processed into a granular shape is adhered to the back surface of with an adhesive. When these waterproofing materials are laid on the bottom or slopes of rivers or rivers, or on revetments, bentonite swells and forms a gel rather than contacting with water, which provides permanent waterproofness. It has the effect of preventing water from rivers and rivers from penetrating and flowing out underground.

In the water stopping method, fine clay with a uniform grain shape called blade metal soil is used, and this clay is deposited on the bottom of an underground or industrial waste treatment plant for about 30 to 50 cm.
The construction method of constructing a so-called impermeable clay layer on the ground by rolling to reduce the gaps between soil particles to create a waterproof layer has been widely used for a long time, but blade metal soil can be used everywhere. It does not exist, so there were economic problems such as carrying large quantities from a distance, and dust pollution problems during transportation.

With respect to this problem, recently, a water-stopping construction method utilizing various water-stopping agents has been proposed and adopted. Above all, a water-stopping construction method using bentonite, which is a type of monrilonite-based clay mineral, is preferred. For example, it has been proposed that a plate-shaped sheet and a corrugated sheet are connected to each other to form a so-called double-sided cardboard, and a void formed between the plate-shaped sheet and the corrugated sheet is filled with bentonite.

[0007]

However, the water-stopping material obtained by filling bentonite in the above-mentioned corrugated cardboard has a large weight per unit area because bentonite is filled in the voids of the corrugated cardboard, and it breaks when elongated. Since it will be damaged, only small pieces with a side length of about 50 cm can be manufactured. Therefore, when laying, small pieces are laid down and deployed, which requires a lot of time for laying and labor costs increase.

Further, a water-stopping material in which bentonite is sandwiched between nonwoven fabrics has been proposed, but most of these water-stopping materials are manufactured by needle punching means, and the work environment is affected by bentonite dust. Deterioration is inevitable, and it becomes expensive in price. Further, a waterproofing material in which bentonite is adhered to a water impermeable sheet has been proposed, but similarly to the above, there is a problem of deterioration of working environment due to bentonite dust during manufacturing and processing of the waterproofing material, and also because of relatively small strength. When the earth and sand are thrown into the compartment with a hydraulic excavator at the time of construction, the water blocking material often breaks, and even if the water blocking material is damaged even a little, the water blocking function will be impaired.

The present invention provides a water-stopping material and a water-stopping construction method which solve the above problems and inconveniences.

[0010]

In order to solve the above-mentioned problems, the water-stopping material according to the present invention is a bulky material having a large porosity formed by a large number of synthetic polymer continuous filaments having a diameter of 0.5 to 1.5 mm. A water-permeable sheet-like material is pasted on the front and back of the three-dimensional mesh mat, and the water-blocking agent is filled in the voids of the mesh and sealed, and the sheet-like material on the front and back is adhered at both ends. One sheet-like portion is extended outward from the above-mentioned both-ends adhesive portion to provide an ear portion for joining.

In the water-stopping construction method of the present invention, the water-stopping ground is leveled, and then the ground is compacted. Laying a filled long strip of waterproofing material, spraying the waterproofing agent on the edges and ears of the waterproofing material, and with the ears of the next waterproofing material to be laid adjacent to this It is characterized in that the edge and the water-stopping agent that has been sprayed are sequentially superposed to form a water-stopping layer made of a water-stopping material on the ground, and then a cover layer is formed on the water-stopping material layer. The water-stopping material of the present invention described above can be preferably applied to this water-stopping construction method.

As the polymer for forming the three-dimensional reticulated mat of the water blocking material of the present invention, a single melt or a composite melt of two or more kinds of thermoplastic synthetic polymers such as polypropylene, polyethylene, polyamide and polyester is applied. However, polypropylene and polyethylene having a relatively low melting point are preferable in view of manufacturing cost. And this three-dimensional reticulated mat has a diameter of 0.5-
A large number of continuous filaments of the above-mentioned synthetic polymer having a length of 1.5 mm are irregularly bent in the horizontal direction and the thickness direction while intersecting with each other to form peaks and troughs, and extend from one to the other at each intersection. It has a structure formed by being adhered to each other, has a thickness of 3 to 20 mm, and has a compressive strength against earth pressure while having a high porosity of about 70 to 99%. If the porosity is less than 70%, the entanglement of the continuous lines of the synthetic polymer becomes too large, and it becomes difficult to fill the water blocking agent in a sufficiently even manner, leading to a reduction in water blocking performance. The restraint becomes insufficient and the compressive strength decreases.

An adhesive may be used as a means for attaching the sheet-like material to the front and back of the mesh mat, but the adhesive force of the synthetic polymer continuous filaments forming the mesh mat may be used. For example, immediately after the formation of the reticulated mat, the sheet-like material is pressed against the reticulated mat before the synthetic polymer continuous filaments are still solidified, and the sheet-shaped material is spread over the width of 10 to 30 mm in the continuous filamentary portions for joining at both ends. It is advisable to pressurize strongly toward the continuous filaments and bond them in a strip shape in the longitudinal direction.

The sheet-like material to be attached to the peripheral surface of the mesh mat has a basis weight of 50 to 500 g / m ² and a fiber density of 0.03.
A water-permeable sheet of ~ 0.15 g / cm ³ is applied, and in the case of a non-woven fabric, a spunbonded non-woven fabric with a small basis weight and a large tensile strength is suitable, but a needle punched non-woven fabric or a synthetic polymer long fiber or split cloth is suitable. Alternatively, a needle punching non-woven fabric reinforced with a coarse woven fabric or the like can also be applied. In addition, a water-permeable sheet-like material having a dense weaving density such as a hessian cloth or a bulky type fabric may be used. The width of the joint-use ears that are extended outward from the both-end-bonded portion during construction is preferably about 5 to 30 cm.

Further, the water blocking agent is not particularly limited as long as it has an existing organic polymer or inorganic material as a main component. For example, polyacrylic acid salts, polyvinyl alcohol, polyacrylonitrile, polyvinyl acetate, CMC and the like can be used as the organic polymer. As the inorganic water blocking agent, for example, natural or synthetic products of clay minerals such as bentonite of the montmorillonite genus, paradellite, nontetronite, savonite, hectorite or attapulgite of the genus holmite, and sepiolite can be used.

The property of the water blocking agent is not particularly limited, and any of powder, granules, powder granules, viscous body and the like can be applied. Among these water blocking agents, in the case of powders, granules, and powdery particles, it is possible to improve the tackiness by using a binder that does not affect the performance of the water blocking agent. The water-stopping agent is a sheet-like material attached to the peripheral surface of a bulky reticulated mat having a large porosity, and the water-stopping agent is filled and sealed in the voids of the reticulated mat. It is more desirable that the waterproofing agent penetrates and is dispersed inside the structure of the sheet-like material, so that the particle size of the waterproofing agent is 200 to 35.
0 mesh is preferred. Sufficient water blocking effect can be secured by deploying and laying the water blocking material thus created. Then, when laying, the ends of the adjacent water-stopping materials are covered with the above-mentioned ears, and the water-stopping material is sprayed and filled between the ears and the water-stopping material at the time of the covering, thereby Water can be stopped between them, and more effective water blocking can be achieved by alternately laying the water blocking material and laying it upside down and spraying and filling the water blocking agent between the joints.

[0017]

When the water-stopping material of the present invention is laid on the bottom or slope of a pond or river, or on a revetment, etc., a sheet-like material is pasted on the front and back of a bulky mesh mat having a large porosity and the mesh mat is formed. Since the water-stopping agent is filled and sealed in the voids, the entire water-stopping layer remains in the state of being constrained within the frame of the voids of the reticulated mat, there is no bias of the water-stopping agent, and the water-stopping agent does not get wet. Then, a uniform water blocking layer is formed over the entire surface. Further, the net-like body and the water blocking agent complement each other in terms of strength to synergistically increase the strength of the water blocking layer. Then, for example, by laying the upper surface and the lower surface alternately for each row, the ears are overlapped and joined to the ends of the adjacent waterproof material, and the waterproof agent is sprinkled and filled into the bonded portions. As a result, a perfect waterproof effect can be obtained. Even after covering the soil with a hydraulic excavator or a bulldozer after laying the waterproof material, the mesh mat and sheet prevent the breakage and deformation of the waterproof layer, and the sheet prevents the waterproof agent from leaking to the ground. Prevent and secure long-term water-stopping action. In addition, it works to prevent subsidence even on soft ground.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially cutaway perspective view illustrating a water blocking material of the present invention, and FIG. 2 is a sectional view in the width direction of the water blocking material. In the figure, (1) is a waterproof material, (2) is a mesh mat, (3) is a wire part for joining the ends, (4) is a mesh base formed on the mesh mat (2), and (5a ) And (5b) are sheet-like materials, (6) is a sealing joint at both ends, and (7) is a water blocking agent.

The reticulated mat (2) has a large number of synthetic polymer continuous filaments (21a) each having a diameter of about 0.6 mm bent irregularly, intersects with each other, and is adhered at each intersection to be longitudinally bonded. Expanded porosity 89%, apparent thickness 10
mm, and the connecting filaments (3) also have the above-mentioned synthetic polymer continuous filaments (21) on both ends of the mesh mat (2).
a). The apparent width of the joining linear portion (3) is about 15 mm, and one side of the joining linear portion (3) and the mesh mat (2) has a basis weight as a water-permeable sheet material (5b). Of 200 g / m ² , a fiber density of 0.06 g / cm ³ , and an apparent thickness of 3 mm are needle-punched non-woven fabric of polyester fiber. Bentonite as a water blocking agent (7) is filled in the voids of the reticulated mat (2), and the filling amount is 3.5 kg / m ² , and a water blocking agent layer having a thickness of about 6 mm is formed. There is.

Further, the reticulated base (4) is joined to the other surface of the reticulated mat (2) by the continuous filaments (21b), and the water-permeable sheet-like material (5a) is attached to the free surface of the reticulated base (4). As a needle-punched non-woven fabric of polyester fiber having a basis weight of 200 g / m ² and a fiber density of 0.06 g / cm ³ ), the waterproofing agent (7) is attached to the upper and lower sheet-like materials (5a) (5b). It is sealed in between. The above-mentioned sheet-like materials (5a) and (5b) are spot-bonded (8) to the projecting ridges (22) of the continuous filaments (21a) and (21a), and also the joining filaments (3). In this case, the sheet-like materials (5a) and (5b) are strongly pressed against the continuous filaments in that part and adhered in a substantially linear manner (9), and both ends of the waterproofing material (1) are sealed. A joint (6) is formed. If it is desired to increase the adhesive strength of the sealing joints (6) (6) at both ends, it is preferable to increase the density of the filaments (21a) (21b) of the joint filament (3).

The water blocking material (1) of the present invention is shown in FIGS.
It can be efficiently manufactured by using the apparatus schematically shown in FIG. That is, a polypropylene resin melt is spun out as continuous filaments (21a) (21b) from two spinnerets (31) (32) in which a large number of spinning holes (30) having a hole diameter of 0.6 mm are arranged. As shown in FIG. 4, below the mouthpiece (31) of the carrier, there is provided a carrier (3
5) is moved in the direction of the arrow at a speed slower than the falling speed of the continuous filament (21a), and the continuous filament (21a) is placed on the carrier (35).
(21b) Spin a group and let it fall naturally to form individual continuous filaments (21a) (2
The irregular loops are drawn in 1b) and accumulated on the carrier (35). Then, during the accumulation, the filaments (21a) (21a) are self-fused at the intersection, and while the accumulated filaments (21a) (21a) are not solidified, the sheet-like material (5
b) is supplied while being pressurized by the stepped roller (36) on the integrated filaments (21a) (21a), the reticulated mat (2) and the joining filaments formed by the filaments (21a) (21a) group. Adhesive to one side of part (3), then flip this molding over to the next stepped roller (3
7) to correct the position and then drop the waterproof agent (7) bentonite from the waterproof agent supply device (70) to form a mesh mat.
It is filled in the void of (2) and guided while controlling the position with the stepped roller (38) below the other spinneret (32), and the reticulated mat (2) and the joining linear part (3). The filaments (21b) and (21b) spun from the spinneret (32) are dropped onto the base to form the mesh base (4) and the filament portion (3) for joining, and
Similar to the above, while the filaments (21b) (21b) are not solidified, a sheet having a width dimension that extends outward by about 10 cm from the dimension between the joining filament portions (3) on both sides. Direct the strip (5a) toward the mesh base (2) and the joining wire (3), and
9) and the smoothing roller (40) while pressurizing and supplying the spinneret.
By bonding the sheet-like material (5a) to the upper surface of the reticulated base (2) and the bonding filament (3) by the adhesive force of the filaments (21b) and (21b) spun from (36). Ear (11) (1
It is possible to continuously obtain the water blocking material provided with 1).

FIGS. 6 and 7 show sheet-like materials (5b) and (5b).
It is a schematic sectional drawing in the adhesion position of a).

Using the water blocking material (1) thus obtained, water blocking of the artificial pond was performed as follows. First, the local ground is stripped with a shovel or the like to dig a pond, and the stripped ground of the pond bottom is compacted with a tire roller or the like to form a construction ground (50). Lay the first long waterproofing material (1-1) on top of it, and place the waterproofing agent (7A) on the edges and ears (11) of the waterproofing material (1-1). After spraying, the next waterproofing material (1-2)
The ear end (11) of the water stop material (1-1) at the edge of the water stop agent.
(7A) is laid on top of each other, and in this way, the water-stopping material (1-3) ... is attached to each edge and the ear (11) is attached to the water-stopping agent.
Overlay via (7A), waterproofing material (1-1) (1-2) at the bottom of the pond
(1-3) After forming a water stop layer according to ……, cover with soil to form a soil cover layer (51) with a thickness of about 30 cm, and then cover this soil layer.
Rolled on (51) again with tire rollers. After the rolling operation, a part of the soil cover layer was dug up and the waterproof layer was inspected. No abnormalities were found in the waterproof layer. After the dug up soil cover layer (51) was restored, the pond was filled with water, but no water reduction due to water leakage was observed.

When forming the water blocking layer, as shown in FIG. 9, the adjacent water blocking materials (11) (1) .. A desired water-stop layer can be formed even by overlapping and filling the overlapped portion with the water-stopping agent (7A).

[0025]

The water-stopping material (1) of the present invention has a diameter of 0.5 to
Water-permeable sheet-like materials (5a) (5b) on the front and back of a bulky three-dimensional reticulated mat (2) with a large porosity formed from (21a) (21b) on a large number of synthetic polymer continuous filaments of 1.5 mm , The mesh mat (2) is filled with the waterproofing agent (7) in the voids and sealed, and the sheet-like objects (5a) (5b) on the front and back are adhered at both ends, and at least one on the front and back Ears for joining in which a sheet-like material is extended outward from the above-mentioned both-ends sealing joints (6) (6)
(11) Since (11) is provided, the waterproofing agent (7) is layered and filled in the voids of the reticulated mat (2), and the entire waterproof layer is the voids of the reticulated mat (2). The water-stopping agent is restrained in the frame, and the water-stopping agent (7) is kept almost even thickness over the entire surface, and a perfect water-stopping layer can be obtained by absorbing water. You can In addition, the ears (11) (1
Since it has 1), it has an adjacent waterproofing material (1-
1) (1-2) ... Helps prevent water leakage.

After arranging the still water ground, the ground (5
(0) is compacted, and the ears (11) (11) for joining are extended on both edges, and the waterproofing agent (7) is filled inside the long strip-shaped waterproofing material (1-). 1) is laid, and the waterproofing agent (7A) is sprayed on the edges and ears (11) of the waterproofing material (1-1), and next waterproofing material (1 -Water stop 8 with the ears (11) and the edges of -2) sprinkled
Water-stopping material on the ground (1-1) (1-2)
According to the water-stopping construction method of forming a water-stop layer according to ......, and then forming the soil cover layer (51) on the water-stop material layer,
Construction can be performed with a smaller amount of waterproofing agent than in the past, so that a waterproofing layer with a uniform thickness can be efficiently formed, and even an unskilled operator can perform accurate waterproofing. The cost can be reduced. After formation of the water blocking layer, the water blocking layer is covered with a hydraulic excavator or bulldozer, and there is no fear of destruction or deformation of the water blocking layer even if it is compressed by a tire roller, etc. ) To the ground to maintain a stable water stopping effect for a long period of time, which is convenient for water stopping construction on steep slopes as well as gentle slopes, and it also has the effect of preventing ground subsidence on soft water-stopping ground surfaces. Demonstrate.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a water blocking material of the present invention.

FIG. 2 is a cross-sectional view in the width direction of the water blocking material of the present invention.

FIG. 3 is a simplified side view illustrating the method for manufacturing the water blocking material.

FIG. 4 is a partial perspective view showing a surface of a carrier.

FIG. 5 is a partially omitted bottom view showing a spinning hole of a spinneret.

FIG. 6 is a cross-sectional view of a bonding position between a mesh mat and a sheet material.

FIG. 7 is a cross-sectional view of a bonding position between a mesh base and a sheet-like material.

FIG. 8 is an explanatory diagram of a waterproof construction method of the present invention.

FIG. 9 is a cross-sectional view showing another example of the waterproof construction method.

[Explanation of symbols]

1 water stop material 2 mesh mat 3 Line part for joining 4 reticulated base 5a sheet 5b sheet 6 Sealed joint 7 Waterstop 8 Adhesion 9 Adhesion 11 ears 21a Continuous line 21b Continuous line 50 ground 51 soil cover layer

Claims (3)

[Claims] 1. A water-permeable sheet-like material is attached to the front and back of a bulky solid reticulated mat having a large porosity, which is formed by a large number of synthetic polymer continuous filaments having a diameter of 0.5 to 1.5 mm. Bonding in which the waterproof material is filled and sealed in the voids of the mat and the front and back sheet-like materials are adhered at both end portions, and at least one of the front and back sheet-like portions is extended outward from the both-end sealing joint portion. Water-stopping material having ear parts for use. 2. A long strip waterproofing material in which the waterproofing soil is leveled and then the soil is compacted, and the joining ears are extended on both edges thereof and the waterproofing agent is filled therein. A waterproofing agent on the edge of the waterproofing material and on the ears, and on the waterproofing agent sprayed on the ears and edges of the next waterproofing material to be laid next to this The method for waterproofing is characterized in that a waterproof layer made of a waterproof material is formed on the ground by sequentially superimposing and joining to the above, and then a soil covering layer is formed on the waterproof layer. 3. The water-stopping material according to claim 1, wherein the water-stopping agent is a fine powder or a viscous material of an organic polymer, an inorganic material alone or in a mixture.